Note 20 - Segment Information (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($) a Segment
Segment Reporting Information [Line Items]
Number of Reportable Segments | Segment	7
Reduction in reserves impacted	$ 6
Gross Profit
Segment Reporting Information [Line Items]
Reduction in reserves impacted	3
Selling, General and Administrative Expenses
Segment Reporting Information [Line Items]
Reduction in reserves impacted	2
Research and Development Expense
Segment Reporting Information [Line Items]
Reduction in reserves impacted	$ 1
Eastman Business Park [Member] | Minimum [Member]
Segment Reporting Information [Line Items]
Area of Real Estate Property | a	1,200